Power Window Question

The front driver's side window of my 2001 XJ started making a clicking sound awhile back when raising the window. No noise at all when lowering the window. Today it started making a loud humming noise when raising the window. The clicking noise is gone and replaced by the loud humming noise. Again this is only when raising the window not lowering it. Does it sound like the power window motor is going bad? I looked in the FSM but it does not refer to noises, it only addresses problems where the window doesn't work.